During Defiant's refit in preparation for its three month tour of exploration in the Gamma Quadrant, Commander Elias Vaughn assigned Roness to collate the refit and repair data. She also assisted Lieutenant John Candlewood with upgrades to the computer core. While checking diagnostic reports on a couple of padds, Roness collided with Lieutenant junior grade Nog in a corridor. Nog was also checking data on a padd and not looking where he was going either. She tried to help Nog up and apologised as he was the senior officer, but he brushed her off good-naturedly, also apologising.
Roness was the beta shift flight controller when the Defiant began its mission in June. In the second week of the mission, she sustained a mild concussion on the Vahni Vahltupali homeworld during an earthquake. Shortly afterwards she was killed aboard the shuttle Sagan while attempting to deflect lunar debris from the planet. (DS9 - Mission Gamma novel: Twilight)